Determine the check digit (as described in the text) that should be appended to the blood bank identification number 312680013325001.
A) 7
B) 6
C) 5
D) 3

Question

Quizplus · Accepted Answer

To calculate the check digit, we need to take the 14-digit blood bank identification number (31268001332500) and multiply each digit by either 1 or 3, alternating between the two. Then, we add up the products and find the remainder when divided by 10. The check digit is the difference between 10 and this remainder.

The calculations are as follows:
3(1) + 1(3) + 2(1) + 6(3) + 8(1) + 0(3) + 0(1) + 1(3) + 3(2) + 2(1) + 5(3) + 0(1) + 0(3) = 80
Remainder when divided by 10: 0
Check digit: 10 - 0 = 10 (not a single digit, so we take the difference between the last two digits, which is 0)

Therefore, the correct check digit to append to the blood bank identification number is 5.

Determine the Check Digit (As Described in the Text) That